Aquarists at ZSL London Zoo are launching an urgent worldwide appeal to find a female mate for the last remaining males of a critically endangered Madagascan cichlid species.

The Mangarahara cichlid Ptychochromis insolitus, is believed to be extinct in the wild, due to the introduction of dams drying up its habitat of the Mangarahara River in Madagascar, and two of the last known individuals are residing in ZSL London Zoo’s Aquarium.